By setting a second = 299,792.458 kilometers, and c=1, units will now treat mass-energy-spacetime as one family. Convert energy<->mass, time<->distance. The formulas are unchanged, Nothing breaks. If it returns mass instead of energy just specify watt hrs or grams. The universe already works this way. Most software pretends otherwise.
energy entropy physics conversion spacetime entropy-rate relativity massenergy entropy-measures entropy-estimation entropy-analysis
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Updated
Aug 10, 2026 - Python